Hoisting apparatus.



T. HADDOW. HOISTING APPARATUS, APPLIoATIoI FILED SEPT. so, 1907.

Patented Dec. 29,1908.

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THOMAS HADDOW, OFy WEST HOBOKEN, NEW JERSEY.,

HOISTTNG APPARATUS.

Specication of Letters Patent.

Patented Dec. 29, 1908.

Application filed September 30, 1907. Serial No. 395,106.

To all whom it may concern:

Be it known that l, THOMAS HAnnow, a citizen of the United States,residing in West Hoboken, Hudson county, New Jersey, have invented acertain new and useful lmprovement in Hoisting Apparatus; and T dohereby declare the following to be a full, clear, and exact descriptionof the invention, such -as will enable others skilled in the art towhich it appertains to makel and use the same, reference being had tothe accompany drawings, and to 'letters of reference marked thereon,which form a part of this specification.

My present invention relates to hoisting apparatus, and particularly tothat specific branch of this art having reference to means for operatingelevators, dumb-waiters, etc., etc;

My invention has for its object so to arrange the tackle of a hoistingapparatus as to require very little space for the reception of the same,theminimum of weight to counterbalance the load, but little power toeffect the vertical movements of the load, and a comparatively simplemount or supporting frame for the journaled elements of the apparatus.

My invention will be found fully illustrated in the accompanying drawingin which,

Figure 1 is a side view thereof; Fig. 2 a vertical sectional view online of Fig. 1; and, Fig. V3 a top plan view.

In the frame a are journaled, one above the'other, the shafts b and cwhich, asy will hereinafter appear, are normally drawn toward each otherby the rope, cable or chain, any of which may be used as Ahereinafterdescribed; the shafts are set so 'that the shaft c is slightly obliqueto shaft b, for a reason also to appear. On shaft b are fixed a largesheave or pulley d and a small sheave or pulley e; on shaft c are fixeda large sheave or pulley f and a small sheave or pulley g. The largepulleys d and f and the small pulleys e and gV are substantially alinedvertically with each other at one side of their respective axes,although at the other sides of said axes the lower pulleys standslightly offset with respect to the upper pulleys on account of theoblique disposition of shaft c, the amount of such offset beinglpreferably approximately edual to the thic ness of each pulley. In theframe a is also arranged a shaft h on which are journaled the pulleys 5,and

7c designates the load-carrier, having the Vpulley l, and m the weighthaving the pulley fn.

o is an endless rope, like, which for brevitys designate the rope Saidrope extends from the pulley Z first over pulley d, then down aroundpulley f, then over ulley "i, (clearing the portion of the rope etweenpulleys d and f owing to the oblique disposition of shaft c and theposition of the pulleys), then down around pulley n, then up over pulleyj, then down under pulley g, then up over pulley e, and then down underpulley Z. On either shaft b or c, but preferably the former, is alsofixed the power sheave p having a convenient endless operating rope,chain or cable g. Pulleys d ,and f being, as shown, equal in diameter,as also pulleys e and g, if they are rotated in the direction of thearrows (Fig. 1) pulleys f and d will take up the part of rope o markedo1 (Fig. 1) faster than the part of said rope marked ozis paid out bypulleys e and g, which will resolve itself into the raising ofload-carrier k; and if the pulleys are rotated in the reverse directionthe load-carrier will obviously descend.

It will be obvious that the frame a may be in the form of a block, beingitself thus a moving part of a tackle.

Having thus fully described my invention, what l claim as new and desireto secure by Letters Patent is:

1. The combination of the load-carrier, a supporting structure, pulleysof diHerent diameters rotatable together and journaled in said`structure, other `ulleys of different diameters also rotatab e togetherand journaled'in said-structure, an endless rope having a runningengagement with the load-carrier and extending around the larger pulleysin one direction and around the smaller pulleys in the same direction,said rope having a loop formed therein, and a weight suspended in saidloop, substantially as described.

2. The combination of the load-carrier, a supporting structure, pulleysof different diameters rotatable together and journaled in saidstructure, other ulleys of different diameters also rotatable togetherand journaled in said structure,

chain, cable or the sake, l hereinafter an endless rope having a runningengagement with the load-car- In testimony, that I claim the foregoing,I rier and extending around the larger pulleys have hereunto set my handthis 27 th day of 10 in one direction and around the smaller pul-September 1907 leys in the same direction, said rope having a loopformed therein, means for maintaining THOMAS HADDOW a bend in the loop,and a Weight suspended Witnesses: by the free portion of the loop,substantially vWM. D. BELL,

as described. JOHN IV. STEWARD.

